Turret tool-post.



No. 848,822. PATENTED APR 2, 1907.

G. E. GREENLEAF.

TURRET TOOL POST.

APPLIOATION nun SEPT. e, 1906.

i? l H! 1 2' 0 ii I11! 21 i0 T} 18 26 I 2 11 'm} v 5 27 M V llllh 6Witnesses: Inventor %QW' ww Attorney UNITEDTSTATES PATENT oirnron.

GEORGE E. GREEN LEAF, OF PLAINFIELD, -N JERSEY, ASSIGNOR TO'NILES-BEMENT-PON D COMPANY, OF JERSEY CITY, NEW JERSEY.

TuRRE-r rooL-RosT.

I Specification of Letters Patent.

'ratentecl April 2, 1907.

Application filed September 6, 1906. Serial No. 333529t GREENLEAF, acitizen of the United States,

residing. at Plainfield, Union county, New Jersey, have invented certainnew and useful Improvements in "Turret Tool Posts, of

which the following is a specification.

' This invention, pertaining to turret toolosts, will be readilyunderstood from the ollowing description, taken connection with theaccomp anying drawings, in which Figure 1 is avertical section of aturret tool-post exemplifying my invention, and Fig, 2 a plan of thebase of the same with the turret removed. 4

In the drawings, 1 indicates the. turretsupporting base to be suited.for sliding on a lathe-bed orlathe-carriage, as usual; 2, the turretmounted for rotation thereon on a ver tical axis; 3, tool-receivingrecesses in the turret; 4, set-screws for clamping the tools; 5, acircular recess in the top of the base; 6, a boss projecting from theturret down into this recess; 7, a vertical lock-bolt recess in thebase;-8, a locking-bolt sliding therein; 9, a spring under thelocking-bolt urgingthe locking-bolt upward; 10, an annular series ofdetent-holes in the base of the turret to be selectively engaged by thelocking-bolt 1 1, a pintle axially disposed in the turret; 12, .abushing fast in the turret and fitting the pintle; 13, screws forholding the bushing firmly in the turret; 14, a collar fast on thepintle and engaging downwardly upon the turret; 15, a non-circular headto permit the pintle to be turned; 16, the threaded lower end of thepintle screwing into the basepiece; 17, an annular groovein the pintle18, a collar splined on the pintle below the bushing 12; 19, a collarfast on the pintle below the collar 18; 20,1a spring disposed betweencollars 18 and 19 and urging collar 18 up against the "shoulder n thepintle; 21, ratchet-teeth on the ntiguous 'faces of bushing 12 andcollar 18; 22, a lever pivoted in the base-' iece; 23, the horizontalpivot of this lever; 2fth outer end of this plvot; 25, a roller on theinner end of lever 22engaging vthe annular recess of the pintle; 26, aslot m 22 engaging this slot.

v Assuming the parts tion, with the turret in clamped, as in Fig. 1,

the locking-bolt; and 27 the outer end lever to be in working condigiven08111011 and et it e assumed that the workman desires to turn the turretto new angular position and there reclamp it and by the use of one ofhis hands only.

He ap lies a wrench to pintle-head 15, turns it to t e left, and thusunclamps the turret from the bases Further turning raises the Go 5pintle and depresses and releases the lockingbolt, further turningcauses the teeth to engage and virtually lock the pintle to the turret,and further turning motion results in the turning of the turret. ationleaves the turret standing in its new position, unlocks theratchet-teeth, lowers the pintle, permits the lockin -bolt to go home,and clamps the turret to t e base.

The teeth on bushing 12 and collar 18 are 7o ratchet-teeth with suchdirection of facing that they are active when the pintle is turned inthe unscrewing direction; but when the pintle is turned in the screwingdirection then spring 20 permits the teeth to disengage and the 1pintleto turn idly and do its reclamping wor while the turret remains in itsnew position.

Itmay readily happen that when the ratchet-teeth first meet they willnot int-ermember, their ends striking. In such case spring 20 yields andthe teeth will snap into engagement when they come into proper relativeposition, the spring thus. providing against improper relationship ofteeth as well 8 5 asproviding for the turning of the pintle in theclamping direction without turning the turret. g

I claim as my 1nvent1on- 1. In a machine-tool, the combinationbf a'base, a rotatable toolost mounted on the base, a pintle mounted orrotation andlongitudinal movement in the tool-post and threaded into thebase and having a collar to,

clamp the toofipost to the base, a series of ratchet-teeth surroundingthe pintle and rigid with the toolpost, and a collar mounted on thepintle and having ratchet-teeth to engage the ratchet-teeth carried bythe toolpost and ada ted to be brought into engagemo ment therewith bythe longitudinal movement of the pintlein the tool-post, substane tially as described.-

2. In a machine-tool, the combination of a base, a rotatable tool-postmounted on the '1o5 base, a pintle mounted for rotation and longitudinalmovement the tool-post and threaded into the base-and having a collar toThe reverse oper- 6 5 clamp the tool-post to the base, a series ofratchet-teeth surrounding the pintle and rigid with the tool-post, acollar 8 lined on the pintle and having ratchet-teet adapted by thelongitudinal movement of the intle to be brought into engagement with te teeth carried by the tool-post, and a 8 ring carried by the pintle andurging said collar in the direction of tooth engagement and against ashoulder formed on the pintle, substantially as described.

3. In a machine-tool, the combination of a I base; a rotary tool-post,-a rotatable pintle haying a screw-thread engaging a threaded armfulcrumed in the base, of which one end engages the bolt and theposition of the other is controlled, by said guide, a'ratchet membercarried by the pintle and a ratchet member rigid with the tool-post.

GEORGE E. GREENLEAF.

Witnesses:

GEO. B. VVEAN, FRED E. SUBRING.

